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1 /* p12_mutl.c */ |
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2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL |
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3 * project 1999. |
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4 */ |
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5 /* ==================================================================== |
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6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved. |
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7 * |
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8 * Redistribution and use in source and binary forms, with or without |
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9 * modification, are permitted provided that the following conditions |
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10 * are met: |
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11 * |
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12 * 1. Redistributions of source code must retain the above copyright |
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13 * notice, this list of conditions and the following disclaimer. |
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14 * |
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15 * 2. Redistributions in binary form must reproduce the above copyright |
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16 * notice, this list of conditions and the following disclaimer in |
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17 * the documentation and/or other materials provided with the |
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18 * distribution. |
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19 * |
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20 * 3. All advertising materials mentioning features or use of this |
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21 * software must display the following acknowledgment: |
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22 * "This product includes software developed by the OpenSSL Project |
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23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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24 * |
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25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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26 * endorse or promote products derived from this software without |
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27 * prior written permission. For written permission, please contact |
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28 * licensing@OpenSSL.org. |
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29 * |
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30 * 5. Products derived from this software may not be called "OpenSSL" |
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31 * nor may "OpenSSL" appear in their names without prior written |
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32 * permission of the OpenSSL Project. |
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33 * |
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34 * 6. Redistributions of any form whatsoever must retain the following |
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35 * acknowledgment: |
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36 * "This product includes software developed by the OpenSSL Project |
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37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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38 * |
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39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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50 * OF THE POSSIBILITY OF SUCH DAMAGE. |
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51 * ==================================================================== |
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52 * |
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53 * This product includes cryptographic software written by Eric Young |
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54 * (eay@cryptsoft.com). This product includes software written by Tim |
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55 * Hudson (tjh@cryptsoft.com). |
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56 * |
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57 */ |
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58 |
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59 #ifndef OPENSSL_NO_HMAC |
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60 #include <stdio.h> |
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61 #include "cryptlib.h" |
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62 #include <openssl/hmac.h> |
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63 #include <openssl/rand.h> |
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64 #include <openssl/pkcs12.h> |
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65 |
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66 /* Generate a MAC */ |
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67 EXPORT_C int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen, |
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68 unsigned char *mac, unsigned int *maclen) |
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69 { |
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70 const EVP_MD *md_type; |
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71 HMAC_CTX hmac; |
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72 unsigned char key[EVP_MAX_MD_SIZE], *salt; |
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73 int saltlen, iter; |
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74 |
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75 if (!PKCS7_type_is_data(p12->authsafes)) |
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76 { |
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77 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_CONTENT_TYPE_NOT_DATA); |
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78 return 0; |
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79 } |
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80 |
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81 salt = p12->mac->salt->data; |
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82 saltlen = p12->mac->salt->length; |
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83 if (!p12->mac->iter) iter = 1; |
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84 else iter = ASN1_INTEGER_get (p12->mac->iter); |
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85 if(!(md_type = |
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86 EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) { |
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87 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM); |
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88 return 0; |
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89 } |
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90 if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter, |
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91 EVP_MD_size(md_type), key, md_type)) { |
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92 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR); |
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93 return 0; |
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94 } |
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95 HMAC_CTX_init(&hmac); |
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96 HMAC_Init_ex(&hmac, key, EVP_MD_size(md_type), md_type, NULL); |
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97 HMAC_Update(&hmac, p12->authsafes->d.data->data, |
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98 p12->authsafes->d.data->length); |
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99 HMAC_Final(&hmac, mac, maclen); |
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100 HMAC_CTX_cleanup(&hmac); |
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101 return 1; |
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102 |
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103 } |
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104 |
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105 /* Verify the mac */ |
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106 EXPORT_C int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen) |
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107 { |
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108 unsigned char mac[EVP_MAX_MD_SIZE]; |
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109 unsigned int maclen; |
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110 if(p12->mac == NULL) { |
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111 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_ABSENT); |
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112 return 0; |
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113 } |
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114 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) { |
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115 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR); |
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116 return 0; |
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117 } |
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118 if ((maclen != (unsigned int)p12->mac->dinfo->digest->length) |
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119 || memcmp (mac, p12->mac->dinfo->digest->data, maclen)) return 0; |
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120 return 1; |
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121 } |
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122 |
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123 /* Set a mac */ |
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124 |
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125 EXPORT_C int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen, |
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126 unsigned char *salt, int saltlen, int iter, const EVP_MD *md_type) |
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127 { |
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128 unsigned char mac[EVP_MAX_MD_SIZE]; |
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129 unsigned int maclen; |
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130 |
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131 if (!md_type) md_type = EVP_sha1(); |
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132 if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) == |
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133 PKCS12_ERROR) { |
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134 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR); |
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135 return 0; |
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136 } |
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137 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) { |
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138 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR); |
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139 return 0; |
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140 } |
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141 if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) { |
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142 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR); |
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143 return 0; |
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144 } |
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145 return 1; |
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146 } |
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147 |
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148 /* Set up a mac structure */ |
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149 EXPORT_C int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen, |
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150 const EVP_MD *md_type) |
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151 { |
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152 if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR; |
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153 if (iter > 1) { |
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154 if(!(p12->mac->iter = M_ASN1_INTEGER_new())) { |
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155 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); |
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156 return 0; |
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157 } |
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158 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) { |
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159 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); |
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160 return 0; |
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161 } |
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162 } |
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163 if (!saltlen) saltlen = PKCS12_SALT_LEN; |
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164 p12->mac->salt->length = saltlen; |
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165 if (!(p12->mac->salt->data = OPENSSL_malloc (saltlen))) { |
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166 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); |
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167 return 0; |
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168 } |
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169 if (!salt) { |
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170 if (RAND_pseudo_bytes (p12->mac->salt->data, saltlen) < 0) |
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171 return 0; |
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172 } |
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173 else memcpy (p12->mac->salt->data, salt, saltlen); |
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174 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type)); |
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175 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) { |
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176 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); |
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177 return 0; |
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178 } |
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179 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL; |
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180 |
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181 return 1; |
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182 } |
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183 #endif |